Chocolate-urn.



L. L. ROWE.

CHOCOLATE URN.

APPLICATION FILED NOV. 30, 1909.

Patented July 16, 1912.

4 SHEETS-SHEET l.

2 w w 9T nn m y mm ow 7 u n 6 8 m4 M m w r A m 7 1w z 2 I, 2/ N I EW M 2 L. L. ROWE. CHOCOLATE URN.

APPLICATION FILED NOV. 30, 1909.

L. L. ROWE.

CHOCOLATE URN.

APPLICATION FILED NOV. 30, 1909.

1,032,507. Patented July 16, 1912 4 sunnrs-san'nr 3.

WT EEEE5\ I \/E TD 46. 6. J 75M NE a L. L. ROWE. CHOCOLATE URN. APPLICATION FILED NOV. 30, 1999.

Patented July 16, 1912.

4SHEETS-SHEET 4.

. F [VI J r v 2 H LEVI L. ROWE, OF BOSTON, MASSACHUSETTS.

CHOCOLATE-URN.

Application filed November To all whom ti may concern:

Be it known that I, Lnvl L. Rowe, of Boston, in the county of Suffolk and State of Massachusetts, a citizen of the United States, have invented a new and useful Improvement in ChocolateUrns, of which the following is a specification My invention relates to improvements in urns for heating liquids and it consists mainly in certain details of construction relating to the automatic control of the gas supplied to the burners and the automatic control of the supply of water to the tank and certain other matters to be referred to below. Apparatus of this character may be constructed either to heat one liquid only or to heat two liquids separately, the second liquid being contained in a tank suspended within theapparatus and deriving its heat from the heat of the other liquid which surrounds it.

While my invention is shown embodied in an apparatus of this latter class certain of its details may be otherwise used.

My invention will be understood by reference to the drawings, in which- Figure 1. is an elevation of a tank embodying my invention. Fig. 2 is a vertical section taken on line 2-2 of Fig. 3. Fig. 2 is an enlarged vertical section of the gas inlet shown in Fig. 2. Fig. 3 is a horizontal section on line 33 of Fig. 1. Fig. 4: is an enlarged view of a portion of Fig. 3, Fig. 5 is a front view of the tank with the pipe F and clamp nuts removed. Fig. 6 is an enlarged sectional view of the valve mechanism shown in Fig. 2. Fig. 6 is a cross section of the thermostat. Fig. 6 is an end view of the gas valve indicator. Fig. 7 is a horizontal section on line 7-7 of Fig. Fig. 8 is a fragmentary section comprising a portion of Fig. 7, but showing a moditication of the float valve and inner tank structure, and Fig. 9 shows a modification of the 1 float connection with the water valve.

As a matter of convenience I have shown my invention applied to an apparatus for 1 serving hot chocolate inwhieh the main tank 1 A serves to hold hot water which will keep 1 the chocolate hot, the chocolate being con- 1 tained in the tank B suspended in the outer vessel A from which water may be drawn off i to dilute the chocolate if desired. it may be 1 embodied in an apparatus for other drinks as well.

The outer vessel or tank A is supported i Specification of Letters Patent.

Patented July 16, 1912.

30, 1909. Serial No. 530,573.

on a stand C within which is the gas burner D for heating the contents of the tank A as shown in Fig. 2. The stand is perforated as at 0 to permit an air supply and has a slide C to cover an opening in the stand. The slide 0 is shown in closed position. The tank A has two faucets E and F. the faucet E for drawing water fromit and the faucet F connected to the chocolate tank B to draw chocolate from it. The tank A also carries a gas supply control G and a water supply control H, these parts being set into a plate or casing J carried in the wall of the tank A and brazed or otherwise attached thereto to form a watertight joint. These various parts will now be described. These controls are similar in some respects and may be de-- scribed generically as fluid controls in so far as they are alike.

The water control comprises a casting H containing a chamber h to which water is led from a water supply by the pipe H the casting 11 being suitably secured in an opening in the plate J. One wall of this chamher is formed by a diaphragm h which is pierced as at k to form a passage for the water to the tank as below described. The passage of water therethrough is controlled by the valve H". This valve 11 is polygonal in cross section so as to slide 1n a right line in the valve chamber and at the same time to allow water to pass through the passage it except when the valve is seated. It is preferably turned down to cylindrical form as at h to give the water from the pipe H freer access to the chamber 11.

The end of the chamber 71 opposite the passage [L2 is closed by a cap ll which is recessed to form part of the chamber 71 and especially to receive the spring 11 which tends to force the valve H to its seat and close the passage 11 The cap H is preferably screwed onto the outer end of the casing H. being provided with recesses to receive the ends of a spanner.

The spring 71 lies between the recess in the cap ll and a shoulder if on the valve which is turned down at its rear end to form not only the shoulder but also a stem to center the spring 7%. The farther end of the valve carries a rubber plug It which is set into a recess therein and held in place by a screw it to form a packing for the valve.

The valve is automatic to maintain the water at a fixed level. To open it 1 have end of the provided a float mechanism as follows: The end ot the misting I whi h pr jects through the plate J in the trout of the tank is reduced in size as at 7r to receive a collar 7.: which clamped thereto by a set screw is. This collar carries a bracket K to which is pivoted at k a lever K ha\ ing a projection K adapted to engage the cud of a 'alve-engaging rod is. This rod lies in a chamber K separated from the chamber it by the diaphragm h This rod near its farther end is reduced in size as at 21: to pass through the passage [1 being somewhat smaller in diameter than the diameter of the passage so as to allow t. The portion 1c of the rod is square to water to pass around,

l l l l center the rod in the chamber K and yet allow the water to pass it. The diaphragm It therefore separates the chamber h from the chamber K The perforation in it serves as part of the water channel to the interior of the tank and the side of the diaphragm forming a wall of the chamber [i also serves as a valve seat for the valve H A perforated plug K closes the end of the chamber K, being perforated to allow the art 10 lirackct K is also pivoted the hinge piece K carrying the rod K to the out-er end of which is pivotaily attached a rod K carry ing a float K. This float may be either cylindrical in construction as shown in Fig. 8 or may be of the shape in cross section shown in Fig. Its shape is in'nnaterial hut for economy of space and cost its shape and that of the inner tank 1 mustbe interrelated as indicated in these views, thus maintaining the shape of the tank A. without increasing its diameter. Sutlicient room must be provided for allowing the float to rise and fall freely.

The collar lr has an opening 7/ which registers will an opening in the wall of the han'iber K. and a pipe fir screw ed into the opening 73 eads the water from the chamber K into the interior oi. the tank preferably diri -tlv into the thermostat as below de cribe-d.

hen the water in the tank falls below its (lOriiW ltn-i the [loot K tall with it. Throu h the intermediate levers, this cau es the cup' in; r d 11- to be pushed in so that it (){Hll the \nlw ll .lQ'tilllJ the force of the spring .--o that water will enter the chauila-r it from the source ot supply ihr -ue'h the pipe H and pa s out. into the llAtHI'lJll'l illltlUlllllll' 'dlQllllHl i1llxi"llllt) the tank A. As the lercl in the tank gradually ri es the 'alvellflrra luallvcloses.

'lh" can supply is controlled h a llltll|l(i-- an -i' pccrliar construction which by its change of cugtlrcontrols the gas \nlve as nil! n n la described. 1

Th asting ti is attached to the plate J in h following n'ianner: lhe piece J above 10 project through it. To the referred to has a circular flange J which projects outwardly from the tank A and forms a. wall of a chainberj the inner por' tion of Wliii'll is formed by a recess in the plate itself. The inner wall of this chamber perforated as at i for the passage of the movahle member J of the thermo tat. Around the perforation is a. flange j threaded on its interior to receive the threaded end of the cylindrical member J of the thermostat, the outer end of which is closed by the cap .l". The cylindrical menp her J of the thernnistat is made of a metal which expands and contracts freely under the action of heat and cold and hencr any change of temperature will change the dis tance of the cap J from the plate J. The movable member J of the thermostat is made of' metal less sensitive to changes of temperature and hence when the part J" eontracts the cap J will push the member J to the left (see Fig. 2), through the pertoration j, but will allow said menilicr J to be pushed back. or toward the right as shown in Figs. .2 and (S, as said i'nei'nbcr J expands again. The part J provided with a centering collar j to support it axially in the cylinder J. About the cylindrical member J is a trough J also made of easily expansible metal and open at the top substantially throughout. its length. It is held in place by the cap .l at; one end and by the flange at the other to which parts it is brazed or otherwise attached. The thermostat is located directly under the end of the pipe Z' so that the fresh water com ing into the tank, first fills the trough J from which it overflows into the tank. By means of this arrangement of pipe. trough and thermostat, the thermostat is in'nnediatcly rw'd d on the introduction or fresh water into the tank and contracts. thus pushing out the rod J and operating the gas valve to turn on the gas in the mann r now to he described.

To the outer end of the flange .l is com pled by a coupling; .l a. tubular section (l into which is s rewed a va ve casing (1. A ga ket J is best uwd It) prevent the leak age of gas around the coupling J" and a packing lies: in a groom in the outside of the casing (i to make a flf:l -'-ll;jlll joint. (his is led into the valve chamber ti" within the casing (i i'rom the v upply pipe ti through the opening in the section (i and a. pert'oration l'l};- 'i l(fllll l' therewith in the cas hip: (i The outer nd ol the asing ti is (hr-rd l v a screw plug (1 and it inner .nd

is partiallv clonal to *l'orm a valve v cat (l. The plug (l carries an indicator (1 which is {)I'tlii'dlllfi provided with a 'lcaiher ti on its innw side to tit into a slot iii the head of the plug (if being: attached thereto by a r-f'l't ti. l'lif: indicat r show the amount oi. adjustnwni maven to the plug and hinre to the spring 9 below referred to and by means of it the gas supply is thus adjusted according to the amount of heat desired. A cap 6: screwed to the end of the section G keeps these parts from ordinary interference.

Within the valve casing G is a valve g which closes against the valve seat G. This valve g is polygonal in shape, the chamber in which it moves being round. Thus it allows gas to pass by it and out through the valve seat when it is not seated. It is turned down as at, g to form a ready clearance for the passage of gas and also to allow a constant passage of gas through the perforation 9 to the pilot passage g 'which is formed in the tubular section G This pilot passage is controlled by the screw g.. A spring 9 bearing against a shoulder 20 9 near the rear of the valve and adjusted by the position of the plug G, tendsto force the valve forward against its seat.

. The valve is opened by means of a system of levers, one of which L is pivoted to a plate L which is attached to the inner wall of the chamber j and carries a friction roller Z against which the end of the thermostat rod J presses. The upper end of this lever L also carries a friction roll 1 30 which bears against a lever L attached to a bracket L projecting from said plate L.

The other end of this lever carries a friction roller 1 which bears against the end of the valve.

A pipe M leads from the chamber 9' to the burners. \Vhen the thermostat is chilled its rod or non-extensible member J is thrust into the chamber j and moves the lever system above described so that the valve g is opened and gas passes from the pipe G through the valve system to the chamber j and out through the pipe M. As the contents of the tank become sufliciently warm the pressure of the rod J upon the lever system being released more or less, the spring asserts itself again to close the valve and cut otl' the main gas supply.

The pilot passage supplies sufiicient gas to the burners to keep the flame alive and so that the contents of the tank will be warm.

I prefer to provide .the plate L with a boss L which sets into the opening j. It has a passage through it for the rod J 2 and assists in centering the rod J As shown the heating apparatus fed by the gas valve comprises a cluster of burners (see Fig. 2), arranged about a common center upon a gas reservoir N. This heater is peculiar in that satisfactory provision is made for it to distribute the gas so that all the burners will receive a constant amount and will give out a uniform flame.

The pipe M passes down inside of the $1 and (j and through it to a point under 65 the middle of the tank A. To its end is attached by a suitable coupling a tip m provided with one or more perforations for the escape of gas and upon this tip m is carried a a dome we having a central passage for the gas. A casing m provided with air inlets m surrounds the tip and dome and provides with the reservoir a chamber for the mixing of the air and gas. This casing is supported rom a screw collar it between which the air inlets are provided.

The reservoir N comprises a casting having a tubular portion 11. adapted to onto the upper end of the casing m A cap N forms the top of the reservoir. It is provided with a number of openings into each of which is set a burner N These openings are arranged in one or more circles near the edge of the cap N and from the under side of the cap projects downward a circular flange N which reaches nearly to the bottom of the reservoir, leaving only a narrow passage for the gas to reach the burners. From the center of theunder side of the cap projects downward an inverted conical deflector N the tip of which enters the inlet through the part n.

While I have thus shown and described a preferred construction and arrangement of burners fon heating the tank A it will be obvious that any other suitable form of heater, capable of receiving its fuel from the pipe M, may be substituted therefor as may 7 be found convenient.

The u per edge of the tank A is bent back on itsel and then outward and upward to form a channel a. A ring also channeled as at a has a downwardly turned lip a which is adapted to restin the channel a. Its upper inner edge forms a rest for the upper edge I; of the inner tank B which upper edge is turned outward and finished around a reinforcing wire. This ring prevents the accidental pouring of liquid intended for the inner tank into the outer tank.

The top A of the tank has a divided edge one portionof which (1 sets down within the tank B while the other portion spreads outward and covers the channel a in the ring and terminates in the channel a at the top of the tank.

A brace A within the top or cover for the tank serves to strengthen it and when shaped asshown serves also as a support for a rotatable paddle A which is hung on the lower end of the shaft A, the upper end of which passes up through an opening in the brace A and is held therein by a bevel gear a. which is screwed onto its upper end and a nut a which it carries and which lies below the brace A The brace A also carries a horizontal shaft A in suitable bearings, this shaft having a bevel gear a at one end meshing with the gear a and a crank handle (1 at the other so that the paddle may be turned. Thisdevice is useful when the tank be set B contains chocolate or other thick substance.

The bottom of the tank B is perforated and when the tank is in position it rests upon the inner end of the pipe F upon the outer end of which is the faucet F through which the contents of the tank are withdrawn. For this purpose the inner end of the'pipe F is closed, but on its upper side it has a circular opening f which is threaded on its interior to receive a hollow clamp screw 7" and is flanged at f to assist in supporting the tank B. The tank B rests upon a gasket f laid upon this flange f am d the screw f being screwed down into the opening with its head resting upon the bottom of the chocolate tank B, clamps the tank in position and makes a liquid-tight joint.

The pipe F which carries the faucet F has by preference a collar or flange F around it near its outer end, its outer end being threaded to receive a clamp nut F A plate I (see Fig. 5), the inner surface of which is curved on the radius of the tank A, its front or outer surface being flat. is

soldered into an opening in the tank. This plate has an opening 77 in it through which the pipe 1* passes and the pipe F carries a slide F which slides on the outer edges of the plate P so that the height of the pipe may be adjusted according to the requirements of the inner tank B. These tanks are not always the same depth and as the inner end of the .pipe F is attached to the bottom of the tank the faucet must be arranged to adjust its height as occasion may require. After the outer end of the pipe F has found its proper level a clamp nut I" screwed onto its outer end and clamping the parts I and F holds the pipe at the proper level.

The apparatus above described solves several problems in the art of making urns of this general character, but its details may be changed somewhat without departing from the spirit of my invention. Moreover the various parts of the invention may be used under different environments to accomplish their purpose, and may still be Within the scope of my claims. I have used the terms water and chocolate simply for convenience as other liquids may be used in the tanks if thought best.

The operation will be clear without further description and lies in its being automatic in all respects. That is, the liquid in the tank will be kept at a constantlevel and the introduction of fresh water will cause an immediate increase of-flame, the thermostat by which the gas is controlled being rendered very sensitive by the fact of its being horizontal and also by the use of the jacket which receives the first water introduced into the tank and holds it so that it chills the thermostat very rapid1y,-the open p of the jacket or trough however, which extends substantially throughout the length of the thermostat, permitting a rapid commingling of the cold incoming water with the warmer water in the tank, so that the gas flame is quickly checked as soon as the chilling effect of the incoming water has been compensated for. The other fettures of its operation are explained above.

It will be'scen that my invention lends itself to easy adjustment and repair. The controls for the gas and water may to re moved as a whole or the gas contrcl re moved for examination and readjustment. I have shown (though not specifically rcfcrred to) gaskets at those points her leakage is liable to occur and they mav be easily replaced whenever neceiiry. The thermostat is especially quick to respond to differences of temperature because it is hori' zontal and receives the incoming water in its surroimding trough and holds it, thus maintaining the gas control in a fixed posi tion until the water has been hated to a propen temperature. It is located neai ill: bottom of the tank where the water wil be the coldest.

In Fig. 9 I have shown a more simple connection between the float and the pater valve. In this case the float rod K is attached directly to the lever K which is pivoted at is to the part K. A fllttlOll wheel It engages the end of the part Zr and the lever K moves the part 763 exactly as does the lever K in the form of construe-- tion shown in Fig. (5.

What I claim as my invention is:---

l. chocolate urn comprising, in comhination. a tank, one or more burners for heating said tank, an automatic fuel control for said burners including a horizontally arranged thermostat located within said tank.

a trough partly inclosing said thermostat but open at the top substantially throughout its length, and means for supplying liquid to said tank arranged to discharge the same into said trough.

2. A chocolate urn comprising, in combi nation, a tank, one or more burners located beneath said tank for heating the same, an automatic fuel control for said burners including a horizontally arranged thermostat located within said tank adjacent the bottom thereof, a trough partly inclosing said ther most-at but open at the top substantially throughout its length, and means for plying liquid to said tank arranged to charge the same into said trough.

3. A chocolate urn comprising, in combi nation, a tank, one or more burners for disheating said tank, on automatic fuel control for said burners including a thermostat lo cated within said tank a jacket partly inclosing said thermostat but having a portion open to said tank substantially throughout the length of said thermostat, a liqui con suptrol for automatically maintaining a consaid thermostat but open at the top substarn stant level of liquid in said tank, and means tially throughout its length, a float valve for for discharging the incoming liquid into controlling the admission of liquid to said said 'acket. tank, and a pipe leading from said float 5 4. he combination with a tank and one valve to said trough.

or more gas burners for heating said tank 1 of a valve for controlling the passage of ga LEVI ROWE to said burners, a horizontally arranged ther- Witnesses:

mostat located Within said tank for control- GEORGE O. G. COALE,

10 ling said valve, a trough partly inclosing M. E. FLAIIERTY. 

